If you guys have not been able to find your in-game giftee, but still fully intend on delivering, you may need to PM them directly and arrange a time to meet up. I know it's more fun to run into them in-game and surprise them, but if you haven't been able to so far, you may just have to end up planning a time when both of you can meet up.
If by Jan 4th. You have not received a gift AND you have not heard from your secret santa, shoot me a message then.
Thanks everyone, and happy 2018!